Keysight NFA Series User Manual

38 Chapter 2
Test Descriptions
Frequency Accuracy
Frequency Accuracy
Test Description
The NFA filter shape is asymmetrical. The center frequency is defined at
the half power level under the curve. The frequency accuracy tests are
performed by measuring selected P
hot
points along the filter curvature.
The half power value of the P
hot
measurements is then calculated. The
frequency which closest matches this value is given as the center
frequency point.
For test purposes the narrow bandwidths are verified at the narrowest
bandwidth of 100 kHz. This is due to the fact that the NFA uses digital
sample processing (DSP). It is therefore only necessary to verify the
narrowest bandwidth with the most accurate specification. Model
N8972A does not support narrow bandwidth functionality.
Test Specification
NOTE On the N8972A model only a DSP bandwidth of 4 MHz is available.
B a n d w i d t h
Frequency range 10
MHz to 3 GHz
4 MHz
±100 KHz
+
χ
2 MHz
±20 KHz
+
χ
1 MHz
±20 KHz
+
χ
400 KHz
±20 KHz
+
χ
200 KHz
±20 KHz
+
χ
100 KHz
±20 KHz
+
χ
Frequency range 3
GHz to 26.5 GHz
4 MHz
±400 KHz
+
χ
2MHz
±400 KHz
+
χ
1 MHz
±200 KHz
+
χ
400 KHz
±80 KHz
+
χ
200 KHz
±40 KHz
+
χ
100 KHz
±20 KHz
+
χ
χ
is equal to the tuned frequency * (1 ± frequency standard in use).

Keysight NFA Series Specifications

General

Brand	Keysight
Model	NFA Series
Category	Measuring Instruments
Language	English